of manchester



@uitrh giants i nited @ffirr.

N. S. BEAN, OF MANCHESTER, NEW HAMPSHIRE.

Letters Patent No. 61,703, dated February 5, 1867. I

IMPROVEMENT IN GARRIAGE-WHEELS.

TO ALL WHOM IT MAY CONCERN: I

Be it known that I, N. S. BEA N, of Manchester, in the county ofHillsboro, and State of New Hampshire, have invented an Improvement inthe Construction of lVheels having wooden spokes and metallic huhsr andI do hereby declare that the following, taken in connection with thedrawings which accompany and form part of this specification, is adescription of my invention suflicient to enable those skilled in theart to practise it. In that class of wheels mostly used under heavyweights, in which the spokes are'of wood set into mortises metallichubs, it is common to reduce the ends of the spokes entering the hubsinto tenons, which, to

keep them tight in the mortises formed in the hub, have but littletaper, as it is found in practice that if the spokcs are considerablytapered in the whole, or any material part of their length, where theyenter the'huh mortiscs, they work loose when the wheel tire stretches.Hcretofore it has been the practice to form the huh tenons on the spokeswith square shoulders, fitting upon the peripheral surface of the hub,but the effect of this in connection with metallic hubs is very often tosplit oil the wood of the spoke where it extends beyond the sidesurfaces of the tenon. To retain the advantages of little or no taper 1nthe-length of the spoke tenons at their hub ends, and to prevent thewoodof the spoke from splitting upward from the sides of the tenon, throughbeing forced upon the periphery of a metal hub, is the object of myinvention, which consists in making the shoulders or oil'sets, at thejuncture of the tenon and spoke, with a bevelled formation instead of asquare one, with a corresponding bevelled formation of the mouth orentrance of the hub mortise.

Figure 1 shows a sectional view of a portion of a metallic hub, withthree wooden spokes set therein, in accordance with my improvement; and

Figure 2 shows a similar view of the ordinary way of setting woodenspokes in metallic hubs.

The metal around the axle cavity is marked a; the meta-lot the hubForming the sides ofthe 'mortises which are cored in the hub is.markedI), while the line representing the peripheral surface of the hub ismarked a c. The tenons on the wooden spokes are marked (1, and thespokes themselves are marked 2. In fig. 2, which illustrates the oldconstruction, it will be seen that the shoulders, at the junction of thespokes e with the tenons d, are substantially square or at right angleswith the central lines of the spokes, said shoulders resting directly onthe peripheral surface of the hub. In fig. 1, which illustrates anembodiment of my improvement, it will be seen that thetenons blend intothe spokes with bevellel or inclined surfaces, which correspond todepressions made in the material of-the huh, so'that the shouldersformed at the junction of the spokes with their tenons are inclined orbevelled instead of square or right-angular, and that they rest withinthe material of the hub instead of on its peripheral surface.

It will be evident that this peculiarity of construction greatly lessensthe liability of the splitting of the wood of the spokes upward from thehub, and that all theadvantages pertaining to substantial parallelism ofthe surfaces of the spoke tenons are preserved.-

I claim the peculiarity ot' construction of the mortises ot' the mespokes, substantially as and for the purpose set forth.

tallic hub, and of the tenons of the wooden N. s. BEAN.

Witnesses J. B. ,Gnosnr, F. GOULD.

